County building permit guide
Nassau County, New York building permits — complete guide (2026)
Nassau County covers western Long Island, adjacent to NYC. There is no county building department — permitting is handled by individual towns (Hempstead, North Hempstead, Oyster Bay) and 60+ incorporated villages. Post-Sandy flood zones continue to affect South Shore construction significantly.
Avg cost: $175–$900
Processing: 3–8 weeks
~18K permits/yr
~1.4M residents
$175–$900Avg permit cost
3–8 weeksProcessing time
18,000Permits/year
PartialADU-friendly
Ready to apply for your Nassau County, New York permit?
NO county building department. Permits issued by your town or village. Check your property tax bill — if you pay village taxes, the village handles your permits.
Find your building dept ↗
Nassau County, New York Building Department
Varies by municipality
Town-level building departments (no county dept)
Varies by town/village
Mon–Fri 9am–4:30pm ET (varies)
Varies by municipality
Town/village-specific portals
No Nassau County building department. Find your town or village — over 60 villages have their own permit systems. Extensive FEMA flood zones on the South Shore.
Permit fees — Nassau County, New York, 2026
| Permit type | Fee range | Processing | Notes |
|---|---|---|---|
| New Construction | $600–$2,500 | 6–10 weeks | Town/village planning + building approval both required |
| Room Addition | $300–$1,500 | 4–8 weeks | Architectural plans; zoning board if non-conforming |
| Roofing | $100–$400 | 1–3 weeks | Very common — post-storm demand |
| Pool | $400–$1,500 | 4–8 weeks | Barrier fence + electrical + health approval |
| Deck | $150–$700 | 2–5 weeks | Setbacks vary by municipality |
| Electrical | $75–$350 | 1–3 weeks | Licensed master electrician required |
| HVAC | $75–$300 | 1–2 weeks | Replacement common permit type |
| Bathroom Remodel | $200–$800 | 2–4 weeks | If moving plumbing — permit required |
| Fence | $75–$200 | 1–2 weeks | Height limits vary by municipality |
| Solar | $100–$400 | 1–3 weeks | Structural + electrical both required |
How to get a permit in Nassau County, New York
1
Identify your municipality
Check your property tax bill. If you pay village taxes, the village handles permits. If township only, apply to the town.
2
Flood zone check
South Shore properties are heavily affected by post-Sandy FEMA maps. Verify your zone at FEMA before designing.
3
Contact your building dept
Over 60 villages have their own departments. Requirements and online capabilities vary significantly.
4
Submit plans
Plans required for additions, new construction, pools. Simple permits (roofing, HVAC) often processed quickly.
5
Zoning review
Zoning and building are handled by the same municipality. Non-conforming projects need zoning board approval before building permit.
6
Inspections
Foundation, framing, rough-in, and final. Trade inspections (electrical, plumbing) separate.
Jurisdictions within Nassau County, New York
Special zone requirements
FEMA Flood Zone AE
South Shore communities
Post-Sandy expansion. Elevation certificates required. Flood insurance mandatory.
Historic Districts
Several villages
Architectural review boards govern exterior changes in designated areas.
Coastal Wind Zone
Ocean-facing South Shore
Enhanced wind resistance requirements for roofing and structural elements.
Frequently asked questions — Nassau County, New York
Does Nassau County have a building department?
No. Building permits are issued by individual towns and villages, not the county. Over 60 incorporated villages in Nassau each have their own building department.
How do I know if I apply to my town or village?
Check your property tax bill. If you pay village property taxes, the village handles your permits. If you only pay town taxes, apply to the town.
What are the post-Sandy requirements?
Many South Shore properties now require elevated construction, flood vents, utilities above the Base Flood Elevation, and flood-resistant materials. Consult a licensed engineer familiar with local requirements.
Can homeowners pull their own permits?
Yes for most residential work. Licensed electricians and plumbers are required for trade work. Homeowners can pull the overall building permit for their primary residence.
US Census Bureau BPS 2024 · Nassau municipal building departments